function verify_radio () {
}

window.onload = function() {
	document.getElementById("done").onclick = function() {
		var can_submit = true;
		var textarea1 = document.getElementsByName('subitem1')[0];
		var textarea2 = document.getElementsByName('subitem2')[0];
		if(!textarea1.value && !textarea2.value) {
			alert('你真的要交白卷吗？这将是0分。');
		} else {
			document.forms[0].submit();
		}
	}
	document.getElementById("goback").onclick = function() {
		history.back();
	}
}
